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Message-Id: <20231008092149.967239-1-aichao@kylinos.cn>
Date: Sun, 8 Oct 2023 17:21:49 +0800
From: Ai Chao <aichao@...inos.cn>
To: hdegoede@...hat.com, ilpo.jarvinen@...ux.intel.com,
markgross@...nel.org
Cc: linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
Ai Chao <aichao@...inos.cn>
Subject: [PATCH] platform/x86: support to store/show powermode for Inspur
Support to store/show powermode for Inspur.
Signed-off-by: Ai Chao <aichao@...inos.cn>
---
drivers/platform/x86/Kconfig | 11 ++
drivers/platform/x86/Makefile | 3 +
drivers/platform/x86/inspur-wmi.c | 180 ++++++++++++++++++++++++++++++
3 files changed, 194 insertions(+)
create mode 100644 drivers/platform/x86/inspur-wmi.c
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 2a1070543391..9e565ee01a9f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -988,6 +988,17 @@ config TOUCHSCREEN_DMI
the OS-image for the device. This option supplies the missing info.
Enable this for x86 tablets with Silead or Chipone touchscreens.
+config INSPUR_WMI
+ tristate "Inspur WMI hotkeys driver"
+ depends on ACPI_WMI
+ depends on INPUT
+ help
+ This driver provides support for Inspur WMI hotkeys.
+ It's support to store/show powermode.
+
+ To compile this driver as a module, choose M here: the module
+ will be called inspur-wmi.
+
source "drivers/platform/x86/x86-android-tablets/Kconfig"
config FW_ATTR_CLASS
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index b457de5abf7d..9285c252757e 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -98,6 +98,9 @@ obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o
# before toshiba_acpi initializes
obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
+# Inspur
+obj-$(CONFIG_INSPUR_WMI) += inspur-wmi.o
+
# Laptop drivers
obj-$(CONFIG_ACPI_CMPC) += classmate-laptop.o
obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o
diff --git a/drivers/platform/x86/inspur-wmi.c b/drivers/platform/x86/inspur-wmi.c
new file mode 100644
index 000000000000..6c4d722e98dc
--- /dev/null
+++ b/drivers/platform/x86/inspur-wmi.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Inspur WMI hotkeys
+ *
+ * Copyright (C) 2018 Ai Chao <aichao@...inos.cn>
+ */
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/wmi.h>
+
+#define WMI_INSPUR_POWERMODE_EVENT_GUID "854FA5AC-58C7-451D-AAB1-57D6F4E6DDD4"
+#define WMI_INSPUR_POWERMODE_BIOS_GUID "596C31E3-332D-43C9-AEE9-585493284F5D"
+
+enum inspur_wmi_method_ids {
+ INSPUR_WMI_GET_POWERMODE = 0x02,
+ INSPUR_WMI_SET_POWERMODE = 0x03,
+};
+
+struct inspur_wmi_priv {
+ struct input_dev *idev;
+};
+
+static int inspur_wmi_perform_query(char *guid,
+ enum inspur_wmi_method_ids query_id,
+ void *buffer, size_t insize, size_t outsize)
+{
+ union acpi_object *obj;
+ int ret = 0;
+ u32 wmi_outsize;
+ struct acpi_buffer input = { insize, buffer};
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+
+ wmi_evaluate_method(guid, 0, query_id, &input, &output);
+
+ obj = output.pointer;
+ if (!obj)
+ return -EINVAL;
+
+ if (obj->type != ACPI_TYPE_BUFFER) {
+ ret = -EINVAL;
+ goto out_free;
+ }
+
+ /* Ignore output data of zero size */
+ if (!outsize)
+ goto out_free;
+
+ wmi_outsize = min_t(size_t, outsize, obj->buffer.length);
+ memcpy(buffer, obj->buffer.pointer, wmi_outsize);
+
+out_free:
+ kfree(obj);
+ return ret;
+}
+
+static ssize_t powermode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret, mode;
+
+ ret = kstrtoint(buf, 0, &mode);
+ if (ret)
+ return ret;
+
+ inspur_wmi_perform_query(WMI_INSPUR_POWERMODE_BIOS_GUID,
+ INSPUR_WMI_SET_POWERMODE,
+ &mode, sizeof(mode), sizeof(mode));
+
+ return count;
+}
+
+
+static ssize_t powermode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int mode = 0;
+ u8 ret;
+ u8 *ret_code;
+
+ inspur_wmi_perform_query(WMI_INSPUR_POWERMODE_BIOS_GUID,
+ INSPUR_WMI_GET_POWERMODE,
+ &mode, sizeof(mode), sizeof(mode));
+ /*
+ *Byte [0]: Return code, 0x0 No error, 0x01 Error
+ *Byte [1]: Power Mode
+ */
+ ret_code = (u8 *)(&mode);
+ ret = ret_code[1];
+
+ return sprintf(buf, "%u\n", ret);
+}
+
+DEVICE_ATTR_RW(powermode);
+
+static struct attribute *inspur_wmi_attrs[] = {
+ &dev_attr_powermode.attr,
+ NULL,
+};
+
+static const struct attribute_group inspur_wmi_group = {
+ .attrs = inspur_wmi_attrs,
+};
+
+const struct attribute_group *inspur_wmi_groups[] = {
+ &inspur_wmi_group,
+ NULL,
+};
+
+static void inspur_wmi_notify(struct wmi_device *wdev,
+ union acpi_object *obj)
+{
+ //to do
+}
+
+static int inspur_wmi_input_setup(struct wmi_device *wdev)
+{
+ struct inspur_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+
+ priv->idev = devm_input_allocate_device(&wdev->dev);
+ if (!priv->idev)
+ return -ENOMEM;
+
+ priv->idev->name = "Inspur WMI hotkeys";
+ priv->idev->phys = "wmi/input0";
+ priv->idev->id.bustype = BUS_HOST;
+ priv->idev->dev.parent = &wdev->dev;
+
+ return input_register_device(priv->idev);
+}
+
+static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+ struct inspur_wmi_priv *priv;
+ int err;
+
+ priv = devm_kzalloc(&wdev->dev, sizeof(struct inspur_wmi_priv),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(&wdev->dev, priv);
+
+ err = inspur_wmi_input_setup(wdev);
+ return err;
+}
+
+static void inspur_wmi_remove(struct wmi_device *wdev)
+{
+ struct inspur_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+
+ input_unregister_device(priv->idev);
+}
+
+static const struct wmi_device_id inspur_wmi_id_table[] = {
+ { .guid_string = WMI_INSPUR_POWERMODE_EVENT_GUID },
+ { }
+};
+
+static struct wmi_driver inspur_wmi_driver = {
+ .driver = {
+ .name = "inspur-wmi",
+ .dev_groups = inspur_wmi_groups,
+ },
+ .id_table = inspur_wmi_id_table,
+ .probe = inspur_wmi_probe,
+ .notify = inspur_wmi_notify,
+ .remove = inspur_wmi_remove,
+};
+
+module_wmi_driver(inspur_wmi_driver);
+
+MODULE_DEVICE_TABLE(wmi, inspur_wmi_id_table);
+MODULE_AUTHOR("Ai Chao <aichao@...inos.cn>");
+MODULE_DESCRIPTION("Inspur WMI hotkeys");
+MODULE_LICENSE("GPL");
--
2.25.1
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